#define _CRT_SECURE_NO_WARNINGS
#include<stdio.h>
int is_leap_year(int y)
{
	if (((y % 4 == 0) && (y % 100 == 0)) || (y % 400 == 0))
		return 1;
	else {
		return 0;
	}
}
int main()
{
	int year = 0;
	for (year = 1000;year <= 2000;year++)
	{
		if (is_leap_year(year))
		{
			printf("%d\n", year);
		}

	}
	return 0;
}